#include "circle.h"
#include "square.h"
#include "line.h"
#include "STACK3.h"


char* Open(/*HWND hwnd*/);
char* Save(/*HWND hwnd*/);
void SaveToFile(Stack<shape *> redo,HWND hwnd);
void OpenFromFile(HWND hwnd,Stack<shape *> redo,Stack<shape *> undo);